A German netizens use of reinforced concrete to build its own 5.1 speaker system.
Although we can not personally experience the "cement" to create a set of speaker effectiveness, but their production process and the process still has part o...
Battery
raw materials: lithium battery 24 from the notebook battery waste removed to buy a single 25 / stars 0 RMB per session 3.7V2AH 3 Series 4 and 12 a group of a total of 2 group backup minds are at ease can also use lead-acid battery 12V7AH...
Production method is very simple: to find a pair of your favorite villain Don glue, size, of course, too modest; dig up the face, and then embedded speakers; original speakers in the circuit boards and wires can be squeezed Puppet belly ~ Let's lo...
